package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Service;

import javax.security.auth.login.LoginException;
import java.time.LocalDateTime;
import java.util.HashMap;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    /**
     * 微信登入
     * @param userLoginDTO
     * @return
     */
//    微信服务接口地址
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session?";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    public User wxlogin(UserLoginDTO userLoginDTO) {
        log.info("微信登入");
//        调用微信接口服务 获得当前微信用户的openid
        String openid = getOpenid(userLoginDTO.getCode());
//        判断openid是否为空  如果为空表示登入失败  抛出业务异常
        if (openid==null){
            try {
                throw new LoginException(MessageConstant.LOGIN_FAILED);
            } catch (LoginException e) {
                throw new RuntimeException(e);
            }
        }
//        判断当前用户是否为新的用户
        User user = userMapper.getByOpenid(openid);
//        查询用户表 若没有则保存openid 自动完成注册
        if (user==null){
//            自动完成注册
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
//        返回用户对象

        return user;


    }

    /**
     * 调用微信接口服务 来获取微信用户openid
     * @param code
     * @return
     */
    private String getOpenid(String  code){
        HashMap<String ,String >map= new HashMap();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json=HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
